Christine - thanks for compiling such a marvellous pictorial history of Folkestone.

A couple of snippets which might interest you. I worked at Seeboard in Hythe in the early 1980s; there was a book containing records of all war damage for both 20th century wars (bombing, of course, disrupted the electricity supply). One of the first records showed that a WW1 bomb destroyed two houses in the High Street, numbers 7 & 8 (looking up the street at the top on the left-hand side); they weren't rebuilt; the last time I was there (probably 30 years ago) the space contained an advertising board.

During WW2 a flying bomb hit and slid along the embankment (travelling westwards) by the Guildhall Street railway arch, destroying greenhouses and a number of houses in Brockman Road, as well as damaging houses in Coolinge Road (some which subsequently needed to be demolished).
I don't believe that this particular bomb destroyed the houses in Darlington Street (I believe that the electricity supply was undamaged), but, as I have been unable to find any photos of Darlington Street, I can't be sure. If you do come across any pictures of Darlington Street, I'd be very interested to see them.
Chris